- #1

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The function f has the property that for any real numbers x and y, f(x+y)=f(x)+f(y)+1. If f(1)=2, what is f(3)?

help.

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- Thread starter Xasuke
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- #1

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The function f has the property that for any real numbers x and y, f(x+y)=f(x)+f(y)+1. If f(1)=2, what is f(3)?

help.

- #2

Tide

Science Advisor

Homework Helper

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Just use the information provided to find f(2) from which f(3) = 8 follows.

- #3

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wow... I feel completely lost.

How do I find f(2)?

How do I find f(2)?

- #4

dav2008

Gold Member

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If you are given that f(x+y)=f(x)+f(y)+1

then it would be logical to conclude that

f(1+1)=f(1)+f(1)+1 and I think you can take it from there

- #5

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Oh my.. Thanks. I'm such an idiot =)

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